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      <a id="max_k"></a>
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      <a id="Indexmax_k" class="indexterm"></a>
      <div class="refnamediv">
        <h2>
          <span class="refentrytitle">max_k</span>
        </h2>
        <p>max_k — 
      Local maximum (or minimum) value of an incoming asig signal
          </p>
      </div>
      <div class="refsect1">
        <a id="idp123117984"></a>
        <h2>Description</h2>
        <p>
      <span class="emphasis"><em>max_k</em></span> outputs the local maximum (or minimum) value of  the incoming asig signal, checked in the time interval between ktrig has become true twice.
    </p>
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      <div class="refsect1">
        <a id="idp123119744"></a>
        <h2>Syntax</h2>
        <pre class="synopsis">knumkout <span class="command"><strong>max_k</strong></span> asig, ktrig, itype</pre>
      </div>
      <div class="refsect1">
        <a id="idp123121952"></a>
        <h2>Initialization</h2>
        <p>
      <span class="emphasis"><em>itype</em></span> - itype determinates the behaviour of max_k (see below)
    </p>
      </div>
      <div class="refsect1">
        <a id="idp123190032"></a>
        <h2>Performance</h2>
        <p>
      <span class="emphasis"><em>asig</em></span> - incoming (input) signal
    </p>
        <p>
      <span class="emphasis"><em>ktrig</em></span> - trigger signal
    </p>
        <p>
      max_k outputs the local maximum (or minimum) value of  the incoming <span class="emphasis"><em>asig</em></span> signal, checked in the time interval between <span class="emphasis"><em>ktrig</em></span> has become true twice. <span class="emphasis"><em>itype</em></span> determinates the behaviour of max_k:</p>
        <p>
      1 - absolute maximum (sign of negative values is changed to positive before evaluation).
    </p>
        <p>
      2 - actual maximum.
    </p>
        <p>
      3 - actual minimum.
    </p>
        <p>
      4 - calculate average value of <span class="emphasis"><em>asig</em></span> in the
      time interval since the last trigger.
    </p>
        <p>
      This opcode can be useful in several situations, for example to implement a vu-meter.
    </p>
      </div>
      <div class="refsect1">
        <a id="idp123197040"></a>
        <h2>Examples</h2>
        <p>
      Here is an example of the max_k opcode. It uses the file <a class="ulink" href="examples/max_k.csd" target="_top"><em class="citetitle">max_k.csd</em></a>.
      </p>
        <div class="example">
          <a id="idp123198896"></a>
          <p class="title">
            <strong>Example 479. Example of the max_k opcode.</strong>
          </p>
          <div class="example-contents">
            <p>See the sections <a class="link" href="UsingRealTime.html" title="Real-Time Audio"><em class="citetitle">Real-time Audio</em></a> and <a class="link" href="CommandFlags.html" title="Csound command line"><em class="citetitle">Command Line Flags</em></a> for more information on using command line flags.</p>
            <pre class="programlisting">
<span class="csdtag">&lt;CsoundSynthesizer&gt;</span>
<span class="csdtag">&lt;CsOptions&gt;</span>
<span class="comment">; Select audio/midi flags here according to platform</span>
-odac  -Ma   <span class="comment">;;;realtime audio out and midi in (on all inputs)</span>
<span class="comment">;-iadc    ;;;uncomment -iadc if RT audio input is needed too</span>
<span class="comment">; For Non-realtime ouput leave only the line below:</span>
<span class="comment">; -o max_k.wav -W ;;; for file output any platform</span>
<span class="csdtag">&lt;/CsOptions&gt;</span>
<span class="csdtag">&lt;CsInstruments&gt;</span>

<span class="ohdr">sr</span> <span class="op">=</span> 44100
<span class="ohdr">ksmps</span> <span class="op">=</span> 32
<span class="ohdr">nchnls</span> <span class="op">=</span> 2
<span class="ohdr">0dbfs</span>  <span class="op">=</span> 1


	<span class="opc">FLpanel</span>	"This Panel contains VU<span class="op">-</span>meter",300,100
gk1,gih1 <span class="opc">FLslider</span> "VU<span class="op">-</span>meter", 0,1,0,1, <span class="op">-</span>1, 250,30, 30,30
	<span class="opc">FLsetColor2</span> 50, 50, 255,  gih1
	<span class="opc">FLpanel_end</span>
	<span class="opc">FLrun</span>

ga1 <span class="opc">init</span> 0
	
<span class="oblock">instr</span> 1

kenv	<span class="opc">linsegr</span>	0,.5,.7,.5,.5,.2,0
ifreq	<span class="opc">cpsmidi</span>
a1	<span class="opc">poscil</span>	<span class="ohdr">0dbfs</span><span class="op">*</span>kenv, ifreq, 1
ga1	<span class="op">=</span>	ga1<span class="op">+</span>a1

<span class="oblock">endin</span>

<span class="oblock">instr</span> 2

	<span class="opc">outs</span>	ga1, ga1
ktrig	<span class="opc">metro</span>	25					<span class="comment">;refresh 25 times per second</span>
kval	<span class="opc">max_k</span>	ga1, ktrig, 1
	<span class="opc">FLsetVal</span> ktrig, kval, gih1
ga1	<span class="op">=</span>	0

<span class="oblock">endin</span>

<span class="csdtag">&lt;/CsInstruments&gt;</span>
<span class="csdtag">&lt;CsScore&gt;</span>
<span class="stamnt">f</span>1 0 1024 10 1

<span class="stamnt">i</span>2 0 3600
<span class="stamnt">f</span>0 3600

<span class="stamnt">e</span>
<span class="csdtag">&lt;/CsScore&gt;</span>
<span class="csdtag">&lt;/CsoundSynthesizer&gt;</span>
</pre>
          </div>
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        <p><br class="example-break" />
    </p>
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      <div class="refsect1">
        <a id="idp123203184"></a>
        <h2>Credits</h2>
        <p>Written by Gabriel Maldonado.</p>
        <p>New in Csound 5 (Previously available only on
    CsoundAV)</p>
        <p>Fixed to agree with documentation in 5.15</p>
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